1 /* vi: set sw=4 ts=4: */
3 * Copyright (C) 2008, Alpha Networks, Inc.
4 * Created by David Hsieh <david_hsieh@alphanetworks.com>
7 * (SEA)ttle i(MA)ge is the image which used in project seattle.
9 * Redistribution and use in source and binary forms, with or
10 * without modification, are permitted provided that the following
13 * 1. Redistributions of source code must retain the above
14 * copyright notice, this list of conditions and the following
17 * 2. Redistributions in binary form must reproduce the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer in the documentation and/or other materials
20 * provided with the distribution.
22 * 3. The name of the author may not be used to endorse or promote
23 * products derived from this software without specific prior
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
27 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
28 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
29 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
32 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
34 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
37 * THE POSSIBILITY OF SUCH DAMAGE.
45 #include <sys/types.h>
49 #include <arpa/inet.h>
54 #define PROGNAME "seama"
55 #define VERSION "0.20"
56 #define MAX_SEAMA_META_SIZE 1024
63 static int o_verbose = 0; /* verbose mode. */
64 static char * o_dump = NULL; /* Seama file to dump. */
65 static char * o_seal = NULL; /* Seal the input images when file name exist. */
66 static char * o_extract = NULL; /* Extract the seama file. */
67 static char * o_images[MAX_IMAGE];/* The image files to pack or seal */
68 static int o_isize = 0; /* number of images */
69 static char * o_meta[MAX_META]; /* meta data array */
70 static int o_msize = 0; /* size of meta array */
72 static void verbose(const char * format, ...)
77 va_start(marker, format);
78 vfprintf(stdout, format, marker);
83 static void cleanup_exit(int exit_code)
85 verbose("%s: exit with code %d\n", PROGNAME, exit_code);
89 static void show_usage(int exit_code)
91 printf( PROGNAME " version " VERSION "\n"
92 "usage: " PROGNAME " [OPTIONS]\n"
93 " -h show this help message.\n"
95 " -m {META data} META data.\n"
96 " -d {file} dump the info of the seama file.\n"
97 " -i {input file} image file name.\n"
98 " -s {file} Seal the images to the seama file.\n"
99 " -x {seama file} Extract the seama file.\n"
101 " SEAMA can pack the input file (with -i) into a seama file.\n"
102 " ex: seama -i target.file\n"
103 " SEAMA can also seal multiple seama files into a single seama file.\n"
104 " ex: seama -s final.file -i taget1.seama -i target2.seama\n"
105 " To extract the raw image from SEAMA, you need to specify the meta.\n"
106 " The first image match the specified meta will be extract to\n"
107 " the output file which was specified with '-x'.\n"
108 " ex: seama -x output -i seama.image -m file=sealpac\n"
110 cleanup_exit(exit_code);
113 static int parse_args(int argc, char * argv[])
117 while ((opt = getopt(argc, argv, "hvd:s:i:m:x:")) > 0)
121 default: show_usage(-1); break;
122 case 'h': show_usage(0); break;
123 case 'v': o_verbose++; break;
124 case 'd': o_dump = optarg; break;
125 case 's': o_seal = optarg; break;
126 case 'x': o_extract = optarg; break;
128 if (o_isize < MAX_IMAGE) o_images[o_isize++] = optarg;
129 else printf("Exceed the maximum acceptable image files.!\n");
132 if (o_msize < MAX_META) o_meta[o_msize++] = optarg;
133 else printf("Exceed the maximum acceptable META data.!\n");
140 /*******************************************************************/
142 static size_t calculate_digest(FILE * fh, size_t size, uint8_t * digest)
145 size_t bytes_left, bytes_read, i;
146 uint8_t buf[MAX_SEAMA_META_SIZE];
148 bytes_left = size ? size : sizeof(buf);
152 while (!feof(fh) && !ferror(fh) && bytes_left > 0)
154 i = bytes_left < sizeof(buf) ? bytes_left : sizeof(buf);
155 i = fread(buf, sizeof(char), i, fh);
158 MD5_Update(&ctx, buf, i);
161 if (size) bytes_left -= i;
163 MD5_Final(digest, &ctx);
167 #define READ_BUFF_SIZE 8*1024
168 static size_t copy_file(FILE * to, FILE * from)
171 uint8_t buf[READ_BUFF_SIZE];
173 while (!feof(from) && !ferror(from))
175 i = fread(buf, sizeof(uint8_t), READ_BUFF_SIZE, from);
179 fwrite(buf, sizeof(uint8_t), i, to);
185 static int verify_seama(const char * fname, int msg)
190 uint8_t checksum[16];
192 uint8_t buf[MAX_SEAMA_META_SIZE];
193 size_t msize, isize, i;
196 #define ERRBREAK(fmt, args...) { if (msg) printf(fmt, ##args); break; }
200 if (stat(fname, &st) < 0) ERRBREAK("Unable to get the info of '%s'\n",fname);
201 if ((fh = fopen(fname, "r+"))==NULL) ERRBREAK("Unable to open '%s' for reading!\n",fname);
203 /* Dump SEAMA header */
204 if (msg) printf("FILE - %s (%d bytes)\n", fname, (int)st.st_size);
207 while (!feof(fh) && !ferror(fh))
210 if (fread(&shdr, sizeof(shdr), 1, fh) != 1) break;
212 /* Check the magic number */
213 if (shdr.magic != htonl(SEAMA_MAGIC)) ERRBREAK("Invalid SEAMA magic. Probably no more SEAMA!\n");
216 isize = ntohl(shdr.size);
217 msize = ntohs(shdr.metasize);
219 /* The checksum exist only if size is greater than zero. */
222 if (fread(checksum, sizeof(checksum), 1, fh) != 1)
223 ERRBREAK("Error reading checksum !\n");
226 /* Check the META size. */
227 if (msize > sizeof(buf)) ERRBREAK("META data in SEAMA header is too large!\n");
229 /* Read META data. */
230 if (fread(buf, sizeof(char), msize, fh) != msize)
231 ERRBREAK("Unable to read SEAMA META data!\n");
236 printf("SEAMA ==========================================\n");
237 printf(" magic : %08x\n", ntohl(shdr.magic));
238 printf(" meta size : %d bytes\n", msize);
239 for (i=0; i<msize; i+=(strlen((const char *)&buf[i])+1))
240 printf(" meta data : %s\n", &buf[i]);
241 printf(" image size : %d bytes\n", isize);
244 /* verify checksum */
249 printf(" checksum : ");
250 for (i=0; i<16; i++) printf("%02X", checksum[i]);
254 /* Calculate the checksum */
255 calculate_digest(fh, isize, digest);
258 printf(" digest : ");
259 for (i=0; i<16; i++) printf("%02X", digest[i]);
263 if (memcmp(checksum, digest, 16)!=0) ERRBREAK("!!ERROR!! checksum error !!\n");
267 if (msg) printf("================================================\n");
273 static size_t write_seama_header(FILE * fh, char * meta[], size_t msize, size_t size)
277 uint16_t metasize = 0;
279 /* Calculate the META size */
280 for (i=0; i<msize; i++) metasize += (strlen(meta[i]) + 1);
281 //+++ let meta data end on 4 alignment by siyou. 2010/3/1 03:58pm
282 metasize = ((metasize+3)/4)*4;
283 verbose("SEAMA META : %d bytes\n", metasize);
285 /* Fill up the header, all the data endian should be network byte order. */
286 shdr.magic = htonl(SEAMA_MAGIC);
288 shdr.metasize = htons(metasize);
289 shdr.size = htonl(size);
291 /* Write the header */
292 return fwrite(&shdr, sizeof(seamahdr_t), 1, fh);
295 static size_t write_checksum(FILE * fh, uint8_t * checksum)
297 return fwrite(checksum, sizeof(uint8_t), 16, fh);
300 static size_t write_meta_data(FILE * fh, char * meta[], size_t size)
305 for (i=0; i<size; i++)
307 verbose("SEAMA META data : %s\n", meta[i]);
308 j = fwrite(meta[i], sizeof(char), strlen(meta[i])+1, fh);
309 if (j != strlen(meta[i])+1) return 0;
312 //+++ let meta data end on 4 alignment by siyou. 2010/3/1 03:58pm
314 for ( ; ret < j; ret++)
315 fwrite("", sizeof(char), 1, fh);
320 /*******************************************************************/
322 static void dump_seama(const char * fname)
324 verify_seama(fname, 1);
327 static void seal_files(const char * file)
333 /* Each image should be seama. */
334 for (i = 0; i < o_isize; i++)
336 if (verify_seama(o_images[i], 0) < 0)
338 printf("'%s' is not a seama file !\n",o_images[i]);
343 /* Open file for write */
344 fh = fopen(file, "w+");
347 /* Write the header. */
348 write_seama_header(fh, o_meta, o_msize, 0);
349 write_meta_data(fh, o_meta, o_msize);
351 /* Write image files */
352 for (i=0; i<o_isize; i++)
354 ifh = fopen(o_images[i], "r+");
366 static void pack_files(void)
374 for (i=0; i<o_isize; i++)
376 /* Open the input file. */
377 ifh = fopen(o_images[i], "r+");
380 fsize = calculate_digest(ifh, 0, digest);
381 verbose("file size (%s) : %d\n", o_images[i], fsize);
384 /* Open the output file. */
385 sprintf(filename, "%s.seama", o_images[i]);
386 fh = fopen(filename, "w+");
389 write_seama_header(fh, o_meta, o_msize, fsize);
390 write_checksum(fh, digest);
391 write_meta_data(fh, o_meta, o_msize);
399 printf("Unable to open image file '%s'\n",o_images[i]);
404 /**************************************************************************/
406 static int match_meta(const char * meta, size_t size)
411 for (i = 0; i < o_msize; i++)
413 for (match = 0, j = 0; j < size; j += (strlen(&meta[j])+1))
414 if (strcmp(&meta[j], o_meta[i])==0) { match++; break; }
415 if (!match) return 0;
421 static void extract_file(const char * output)
425 size_t msize, isize, i, m;
427 uint8_t buf[MAX_SEAMA_META_SIZE];
430 /* We need meta for searching the target image. */
433 printf("SEAMA: need meta for searching image.\n");
437 /* Walk through each input file */
438 for (i = 0; i < o_isize; i++)
440 /* verify the input file */
441 if (verify_seama(o_images[i], 0) < 0)
443 printf("SEAMA: '%s' is not a seama file !\n", o_images[i]);
446 /* open the input file */
447 ifh = fopen(o_images[i], "r");
450 while (!feof(ifh) && !ferror(ifh))
453 fread(&shdr, sizeof(shdr), 1, ifh);
454 if (shdr.magic != htonl(SEAMA_MAGIC)) break;
456 isize = ntohl(shdr.size);
457 msize = ntohs(shdr.metasize);
462 m = fread(buf, sizeof(char), (msize < MAX_SEAMA_META_SIZE) ? msize : MAX_SEAMA_META_SIZE, ifh);
469 fread(buf, sizeof(char), 16, ifh);
473 fread(buf, sizeof(char), msize, ifh);
474 if (match_meta((const char *)buf, msize))
476 printf("SEAMA: found image @ '%s', image size: %d\n", o_images[i], isize);
477 /* open output file */
478 ofh = fopen(output, "w");
479 if (!ofh) printf("SEAMA: unable to open '%s' for writting.\n",output);
484 m = fread(buf, sizeof(char), (isize < MAX_SEAMA_META_SIZE) ? isize : MAX_SEAMA_META_SIZE, ifh);
486 fwrite(buf, sizeof(char), m, ofh);
497 m = fread(buf, sizeof(char), (isize < MAX_SEAMA_META_SIZE) ? isize : MAX_SEAMA_META_SIZE, ifh);
502 /* close the file. */
509 /*******************************************************************/
511 int seama_main(int argc, char * argv[], char * env[])
513 int main(int argc, char * argv[], char * env[])
516 verbose("SEAMA version " VERSION "\n");
518 /* parse the arguments */
519 if (parse_args(argc, argv) < 0) show_usage(9);
522 if (o_dump) dump_seama(o_dump);
523 else if (o_seal) seal_files(o_seal);
524 else if (o_extract) extract_file(o_extract);